<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>初始化 state - 紫霞仙子</title>
</head>
<body>
    <div id="root"> </div>

    <script src="../js/react.development.js"></script>
    <script src="../js/react-dom.development.js"></script>
    <script src="../js/babel.min.js"></script>

    <script type="text/babel">
        //设置数据
        class App extends React.Component{

            constructor(){
                super();
                //添加 state 属性
                this.state = {
                    isNight: true
                }
            }

            render(){
                return <div>
                        <h2>至尊宝, 我是{this.state.isNight ? '青霞仙子' : '紫霞仙子'}</h2>
                    </div>
            }

 
        }

        ReactDOM.render(<App />, document.querySelector("#root"));

    </script>
</body>
</html>